Headset with Magnetic Frictional Coupler

1. A headset comprising: a first member having a first engagement surface; a second member having a second engagement surface, the second engagement surface disposed for movement relative to the first engagement surface along a line of adjustment; and magnetic elements fixed on the first and second members; the magnetic elements arranged to establish a magnetic flux between the first engagement surface and the second engagement surface, the magnetic flux varying as a function of relative position of the first and second members along the line of adjustment, and having peaks at a plurality of detent positions along the line of adjustment; wherein the first member comprises a base, and a protruding structure on the base having a cylindrical outside surface, wherein the first engagement surface is on the cylindrical outside surface; and the second member comprises an opening having a cylindrical inside surface, and wherein the second engagement surface is on the cylindrical inside surface; and wherein the protruding structure has an opening inside the cylindrical outside surface, and further comprising an electronic component disposed within the opening on the protruding structure.

2. The headset of claim 1 , wherein the line of adjustment comprises an arc around the cylindrical outside surface.

3. The headset of claim 1 , including a non-magnetic spacer disposed between the first and second engagement surfaces.

4. The headset of claim 1 , wherein the magnetic elements comprise: a plurality of magnets fixed on the first member, and arranged with a magnetic pole proximal to the first engagement surface and an opposite magnetic pole distal from the first engagement surface, and wherein the poles of the magnets proximal to the first engagement surface are disposed in a pattern corresponding to detent positions in the plurality of detent positions along the line of adjustment; and a complementary magnetic element on the second member, arranged to increase the magnetic flux at the plurality of detent positions.

5. The headset of claim 4 , wherein one or more of the magnetic elements comprise an elongated magnetic strip disposed along the cylindrical outside surface on the first member, and a complementary elongated magnetic element on the second member.

6. The headset of claim 1 , wherein one or more of the magnetic elements comprise a patterned magnetic film fixed on the first member having north and south poles in a pattern proximal to the first engagement surface.

7. The headset of claim 1 , wherein the magnetic flux is an attracting force in some relative positions of the first and second members and a repelling force in at least one other relative position.

8. A headset, comprising: a headband; a boom hub coupled to the headband having a first engagement surface; a boom having a second engagement surface, the second engagement surface disposed for rotation relative to the first engagement surface of the boom hub; and magnetic elements fixed on the boom hub and the boom proximal to the first and second engagement surfaces; the magnetic elements arranged to establish a magnetic flux attracting the first engagement surface to the second engagement surface, the magnetic flux varying as a function of relative angle of rotation between the first and second engagement surfaces, and having peaks at a plurality of detent angles; wherein the boom hub comprises a base, and a protruding structure on the base having a cylindrical outside surface, wherein the first engagement surface is on the cylindrical outside surface; and the boom comprises an opening having a cylindrical inside surface, and wherein the second engagement surface is on the cylindrical inside surface; and wherein the protruding structure has an opening inside the cylindrical outside surface, and further comprising an electronic component disposed within the opening on the protruding structure.

9. The headset of claim 8 , including a non-magnetic spacer disposed between the first and second engagement surfaces.

10. The headset of claim 8 , wherein the magnetic elements comprise: a plurality of magnets fixed on the boom hub, and arranged with one magnetic pole proximal to the first engagement surface and an opposite magnetic pole distal from the first engagement surface, and wherein the poles of the magnets proximal to the first engagement surface are disposed in a pattern corresponding to detent angles in the plurality of detent angles; and a complementary magnetic element on the boom, arranged to increase the magnetic flux at the plurality of detent angles.

11. The headset of claim 8 , wherein one or more of the magnetic elements comprise a patterned magnetic film fixed on the boom hub having north and south poles in a pattern proximal to the first engagement surface.

12. The headset of claim 8 , wherein the electronic component comprises a push button switch.

13. The headset of claim 8 , wherein the magnetic flux is an attracting force in some relative positions of the boom hub and the boom and a repelling force in at least one other relative position.